Grinding-mill.



PATENTED JULY 14 1903.

H. SGHARBAU.

GRINDING MILL.

APPLIOATIOH rum) 00'1.3, 1902.

N0 MODEL.

[72 mm Z02":

20%;: away:

LJM

Patented July 14, 1903.

PATENT OFFICE.

HERMANN SCHARBAU, OF MAGDEBURG', GERMANY.

GRINDING-MILL.

SPECIFICATION forming part of Letters Patent No. 733,875, dated July 14, 1903.

Application filed October 3, 1902. Serial No. 125,760t. (N0 model.)

invented new and useful Improvements inv Grinding-Mills, of which the following is a specification. v

This invention relates to grinding-mills in which a pendulum is used. The construction of such mills is improved in such a manner that between the driving-pulley and the pendulum suspended in a ball-bearing helical springs are inserted, in connection with the cross-piece of the pendulum, to replace a universal joint as used at present.

In the accompanying drawings the driving-pulley with the head of thependulum is shown in Figure 1 in. a vertical section and in Fig. 2 in a plan view. 7

The pulley s is connected with the crosspiece q of the pendulum p by means of helical springs f, which are arranged in pairs, so that if the pulley is rotated the pendulum receives a rotating movement around its own axis. If the pendulum p is brought out of its vertical position,the pendulum is pressed.

against the grinding-surface in consequence of the centrifugal action and rolls along the grinding-surface in a direction opposite to that in which the pulley rotates.

The head of the pendulum p is provided with a ball 70, resting in a ball-bearing in the frame of the grinding-machine, and to the head of the pendulum above the ball 70 the cross-piece q is securely fixed. "The ballbearing can be either rigidly connected with the frame or adapted to rotate'with the pulley s. v

The helical springs f in connection with this ball-bearing act as a cross-joint, because they are prolonged or shortened, according to the position of the pendulum. Besides, the shocks and vibrations of the grinding-mill are reduced by the helical springs f, which are arranged in such a manner that the tension of the springs as-well as the length of the lever acting on the pendulum alter ac cording to the resistance of impetus. In-

stead of the traction-springs pressure-springs or pressure and traction springs combined could be used.

Having fully described my invention, what I claim, and desire to secure by Letters Patent, is

Improved grinding-mill comprising in combination with the usual pulley and pendulum a ball at the upper end of the pendulum resting in a ball-bearing in the frame of the machine, a cross-head fixed to the upper end of the pendulum and helical springs between the ends of the cross-head and the inner surface of the pulley, substantially as described and shown and for the purpose set forth.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses. V

HERMANN SOHARBAU.

Witnesses:

RICHARD MEUMANN, L. MEUMANN. 

